Blowpipe fob



JULIUS THOMPSON, OF NORTH BRIDGEWATER, MASSACHUSETTS.

BLOWPIPE FOR DENTISTS, 86C.

Specifuyaton of Letters Patent No. 9,254, dated September 7, 1852.

To all 'whom t may concern:

Be it known that I, JULIUs THOMPSON, of North Bridgewater, in the county of Plymouth and State of Massachusetts, have invented a new and useful instrument or machine in which the blowpipe and that which contains the flame are united or combined. or an instrument which is a new and useful improvement on the blowpipe for dentists and others who have occasion to make use of any of the varieties of a blowpipe flame, which instrument is called Thompsons Compound Self-Adjusting Blowpipe, and of which I do hereby declare that the following is a full, clear, and exact description of the construct-ion and operation, reference being had to the annexed drawings, making a part of this specification, in which- Figure lst is a perspective view, Fig. 2d a view of the bottom of the instrument when the cover of that bottom is removed, Fig. 3d is a view of a portion of the instrument called the burner containing the wick which is used when alcohol, oil, or burning fluid is used to support the flame, in which case it is to be screwed on at the orice marked I-I in Fig. 1st. Fig. 4th is that part called the bellows supplying the blowpipe with its j et of air; they are in construction similar to the bellows of a melodeon. Fig. 5th shows the position of the blowpipe nozzle and the flame in relation to each other when the instrument itself, or the instrument proper,

is standing untouched; also the kind ofv flame produced if the wick or gas of the burner be ignited, and the bellows in connection with the instrument be worked, while the instrument itself is unmoved. Fig. 6th represents the relative position of the nozzle of the blowpipe and the llame changed, and consequently another variety of blowpipe flame produced, by the action of the hand on the instrument.

In Fig. 1stA is the body of the machine, or instrument, made to contain alcohol, burning fluid, oil or whatever is to support the flame when gas is not used. B is the handle by which the instrument is held while using it. C is the tube by which, when gas is used, the gas is conveyed to be ignited at Y, so that the jet of air from the nozzle X may act upon it. D, is the tube of the blowpipe bywhich the air from the bellows is conveyed to be ejected at the nozzle X. E is the thumb piece, which when the handle B is grasped and held by the ngers of the hand, the thumb can easily and with entire convenience reach, and upon which it can press at pleasure. F, is the rod connected with the thumb piece E and movable perpendicularly, and which rod is therefore depressed or slides down when the thumb-piece is depressed by the pressure of the thumb. G, is another rod capable also of being to some extent raised and depressed, or of a limited perpendicular motion, and J is aring permanently attached to rod G by a short horizontal rod, through which ring the fore finger of the hand which grasps the handle B may be passed and by its pressure upward or downward may depress or elevate the rod G to the extent of its limits of mot-ion. I is the orifice by which the body A is filled. H is the orifice upon, or over, orl

around which the burner K Fig. 3d is to be screwed when alcohol-or other fluid is used, thus by which the wick is supplied from chamber A. T is a flexible tube, or rather it marks a truncated portion of a flexible tube connected with blow-pipe tube D at one end, and the bello-ws at the other, and thus conveying air from the bellows to the nozzle X. S marks a truncated portion of another flexible tube connected at one end with the metallic tube C, and at the other with a regular or fixed gas tube orgasometer or any other thing containing gas, thus through which flexible tube gas may be conveyed to supportI a flame at Y.

In Fig. 2d, D is a part of the blow pipe tube, or the metallic tube through which air from the bellows is conveyed to nozzle X in Fig. lst. C is a portion of the metallic gas tube through which, where gas is used it must flow to be ignited at Y in Fig. lst. Z, marks the place of a stop-cock by which the gas is let on or shut off. I and Q are buttons which hold the gas pipe to the instrument, by turning which into a position the reverse of that represented in the figure and disconnecting lever N from rod G, the gas pipe is at once detached from the instrument. M is a lever connected with rod F and thumb piece E. O is another and shorter lever connected at one end with lever M, and at the other end with blowpipe tube D. By means of these two levers the tube D is made to rotate so as to give all the needed or useful varieties of position to the nozzle X. N is a lever connected at one end wit-h the rod G, and at the other with the stop cock at Z. By means of this lever nozzle back from the flame as seen in Fig. 5.

In Fig. 6, WV marks the natural position, or the position when the instrument stands unmoved, of the curved end and nozzle of the blow-pipe,-while V D X, with the continuous lines shaded between, show the position of the same when the thumb piece E in Fig. lst is pressed upon and the rod F is depressed nearly or quite to its limits.

The other figures have been already sufficiently described, it remains therefore only to describe the operation.-\Vhen gas is used, the tube C is attached as seen in Figs. 1st and 2d, which tube is connected with some kind of gas xture by means of a ilexible tube, a small piece of which is seen represented at S in Fig. 1st. By passing the forefinger of the hand which holds the instrument. into the ring J Fig. 1st and by this means sliding the roc Gr, the stopcock at Z is opened, the gas flows on and is ignited at Y. By sliding it in the opposite direction, the stopcock is closed and the flow of gas at once arrested. If gas is not used, let the tube C be detached by turning the buttons at P and Q Fig. 2, and removing the pivot connecting lever N with rod G. Then tie a bundle of common lamp wicking to the end of a piece of wire and thrust in to the burner K Fig. 3, thus arranging the wick. Then screw this burner on at the orifice H Fig. 1st, and fill the body of the instrument marked A at orifice I with alcohol or whatever is selected to supply the flame. Then if gas is used ignite it at Y, if not, ignite the wick in burner K and place the bellows, connected with the instrument by the flexible tube a portion of which is seen at T Fig. lst, on the floor and work them with the foot placed on the elevated end. The result is, if the thumb piece E remains untouched and unmoved, a broad, flaring, or roaring flame y used for simple heating, such as is seen represented in Fig. 5th. By pressing upon the thumb piece E the nozzle X is brought nearer' to the flame and always rightly directed toward it, so as to produce according to the pressure, a flame more or less long, sharp and finely pointed; so that according place, but if held in the hand, one hand is sufficient both for the holding and moving, and also the entire management of it, so that the other hand is leftentirely free for holding the substances to be operated upon.

The advantages of my instrument over that called the flexible gas pipe, that is, over the hydrogen gas pipe, are these:

vFirst, the flexible gas pipe will produce but one kind of flame, whereas my instrument will produce every variety of blowpipe flame, and that instantly at the will of the operator. This is the great difference.

Secondly, a blowpipe flame, may by my instrument, be had without charging a hydrogen gas generator, or gasometer, which is not the case with the other.

Thirdly, my instrument is portable, the gas apparatus is diflicult to move.

Fourthly, the expense of my apparatus is not one half of that of a hydrogen gas apparatus.

Now I do not claim the connecting a common blow-pipe with a bellows by means of either a flexible or inflexible tube. Nor do I claim the invention of a lamp for blowpipe purposes, which may be operated with alcohol, burning fluid, or oil or any other combustible substance, nor do I claim the use of a gas flame for blow-pipe purposes instead 0f a spirit or other flame; but

Vhat I do claim as my invention and desire to secure by Letters Patent, is-

1. The combination in one instrument of the flame of gas, or a lamp with a blowpipe, so that both operating together, may beheld in one hand, and the flame applied on any spot, in any direction, and for any length of time, at the will of the operator.

2. The arrangement of the thumb piece E or its equivalent, in combination with the flame of gas, or a lamp, and a blowpipe, so that while the instrument'is held in one hand a movement of the thumb willvadjust the blow-pipe to the flame in such a way as to produce any desired variation in the llame as above described and set forth.

I do not intend by this claim, as I have intimated above to restrict myself to the mode ofv construction herein or above described, but to reserve the right to vary the same as I may deem expedient, while I attain the same ends by means substantially the salne.

In witness whereof I have hereunto subscribed my name this first day of July eighteen hundred rand fifty two.

J ULIUS THOMPSON. Witnesses GEO. W. BRYANT, J AMES B. AMES. 

